Electric incandescent lamp



v June 21, -1938. EJN'IICKLEY ELECTRIC INCANDESCENT LAMP Filed- May 10', 1937 Fig. 2.

Uu PW m mm P film vw n a Patented June 2 1, 1938 UNITED STATES PATENT orrics emcrnrc INCANDESCENT mm Erich Micklcy, Berlin-Zehlendorf, Germany, assignor to General Electric Company, a corporation of New York Application May 1937, Serial No. 141,819 In Germany May 25, 1936 3 Claims.

10 with respect to the lamp axis. Still another object of my invention is the provision of a filament mount structure which will permit the coiled filament to be readily and positively fastened thereto on high speed machines serving for mass production.

Other objects and advantages of my invention will appear from the following description of a species thereof and from the accompanying drawing, in which:

2 Fig. 1 is a side elevation of an electric miniature lamp comprising my invention; Fig. 2 is a front elevation, partly in section, of the lamp' shown in Fig. 1, the view being taken at ninety degrees to that of Fig. 1; and Fig. 3 is an en- I larged perspective view of the filament mount structure and associated coiled filament, showing the manner in which the latter is fastened to the two lead wires.

To accomplish the previously mentioned objects of my invention, the two lead wires which support and supply current to the coiled filament are, according to the invention, bent above the glass bead at an appreciable angle, and perpendicular to the center plane of the lamp passing through the unbent portions of the two lead wires. The upper ends of the two lead wires are bent back towards the said center plane and substantially perpendicular thereto, and are formed with hooks at the ends thereof, which hooks are disposed within and at right angles to the said center plane. The ends of the coiled filament, which is arranged in this same center plane, are clamped in these hooks.

Referring to the'drawing, the lamp comprises a spherical glass bulb I, the filament l2, and the two current-supply or lead wires II, M, which are sealed in a glass bead l3 and which serve to support the filament. The outer leads I5, I 5, which protrude from the neck l6 of the bulb, are soldered to the base sleeve l1 and to the bottom center contact l8 respectively, of the base. The two inner lead wires l4, M are provided above the glass bead l3 with portions l9, l9 bent 'at an appreciable angle to the longitudinal axis of I 55 the lamp but perpendicular to the center plane of .the lamp passing through the unbent portions of the two inner lead wires ll, H. The upper ends of the two inner lead wires are bent back towards the above-mentioned center plane to form the portions 20, 20, which extend substantially perpendicularly to said center plane; As

is evident from the drawing, the inner portions I9, l9 and 20, of the inner lead wires are preferably made to extend parallel to each other, and

provide, in effect, a V-shaped support for the 10 coiled filament which will be particularly vibration proof. The ends. of the portions 20, 20 are formed with horizontally disposed clamps or hooks 2|, 2| which likewise extend substantially perpendicularly to the previously referred to cen- 15 ter plane, and are disposed within the same.

The ends.|2' of the filament l2, which extend longitudinally of the lamp, are inserted into the open hooks 2|, 2| from the side thereof, in the direction indicated by the arrows in Fig. 3, 2o whereupon the filament I2 is disposed in an exactly symmetrical position with respect to the axis of the--'lamp by closing the hooks 2|, 2|. In this manner, the fastening of the coiled filament to the inner lead wires can be readily and positively carried out on the high-speed machines which serve for mass production, and which are commonly known as mount making machines. The height of the filament |2 above the clamps or hooks 2|, 2| is preferably selected in such a way that the filament will, at the same time, be symmetrically disposed with respect to' Y the center point of the lamp.

Although I have shown a linear filament l2, it should be understood that the same may be V- shaped or of any other form. In addition, the lamp bulb H and the base may also have any other desired shape. What I claim as new and desire to secure by Letters Patent of the United States is: 40 1. In an incandescent lamp, thecombination of a glass bulb having a filament sealed therein and lead wires extending through said bulb and bending the inner ends of the lead wires of said mount into substantially V-shaped portions the planes ofwhich are perpendicular to the plane of said lead wires, forming the extremities of said V-shaped portions with filament engaging hooks extending perpendicularly to and disposed withinthe plane of said lead wires, inserting the end portions of a filament in said hooks by relative movement therebetween transversely of the plane of said lead wires, and clamping said hooks o securely to saidend portions of said filament.

ERICH IWICKLEY. 

